Think of it as a slide rule. Why bother using a slide rule when you can
do it in your head? Come to think of it, why bother using an E6B? Just
do it in your head. It is all simple math anyway. I am not saying it is
impossible to do all this in your head. One does not need a PhD to
figure out which way to turn when the CDI deflects one way. The goal,
however, is to reduce the number of brain CPU cycles. It frees up more
time for more important things. Everyone has their own favorite way of
using the CDI, but I have never encountered anyone who did not think
that the heading interpretation was significantly simpler than the
left/right interpretation after I finish explaining it to them.
Regarding wind, the wind correction naturally falls out of the CDI
deflection. I have elaborated this elsewhere, and I am getting tired of
sounding like a broken record, so I will leave that up to you to look it
up.




Andrew Gideon wrote in
online.com:

Andrew Sarangan wrote:

No, it is not just a reminder, it is a tremendous aid in
interpretation. Reverse sensing is all in your head.

Amusing combination of text, as the OBS only helps in this context if
the heading isn't [still] in your head. Yes, the information provided
is important. But - at least in my experience - it's already in
memory.

What I don't understand is why nobody has yet mentioned wind
correction in this thread. When flying a localizer, I'll typically
have some amount of crab in place. Thus, my DG should read something
different from the track of the approach (and the OBS). If the needle
starts to drift (and assuming I've maintained my intended heading
{8^), I'll correct that intended heading one way or the other.

So while the plate may tell me to fly 223, I may flying 230. Tempting
it is to put 230 in the OBS, as that's not written anywhere. But
that's too much futzing (esp. as it is a dynamic value), so I just
live with the need to remember.

- Andrew